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diff --git a/test/CodeGen/X86/2009-04-27-LiveIntervalsAssert2.ll b/test/CodeGen/X86/2009-04-27-LiveIntervalsAssert2.ll
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index 0000000000..70cb4ff3c8
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+++ b/test/CodeGen/X86/2009-04-27-LiveIntervalsAssert2.ll
@@ -0,0 +1,23 @@
+; RUN: llvm-as < %s | llc -mtriple=i386-apple-darwin9
+; PR4051
+
+define void @int163(i32 %p_4, i32 %p_5) nounwind {
+entry:
+ %0 = tail call i32 @foo(i32 1) nounwind ; <i32> [#uses=2]
+ %1 = icmp eq i32 %0, 0 ; <i1> [#uses=1]
+ br i1 %1, label %bb.i, label %bar.exit
+
+bb.i: ; preds = %entry
+ %2 = lshr i32 1, %0 ; <i32> [#uses=1]
+ %3 = icmp eq i32 %2, 0 ; <i1> [#uses=1]
+ %retval.i = select i1 %3, i32 1, i32 %p_5 ; <i32> [#uses=1]
+ br label %bar.exit
+
+bar.exit: ; preds = %bb.i, %entry
+ %4 = phi i32 [ %retval.i, %bb.i ], [ %p_5, %entry ] ; <i32> [#uses=1]
+ %5 = icmp eq i32 %4, 0 ; <i1> [#uses=0]
+ %6 = tail call i32 @foo(i32 %p_5) nounwind ; <i32> [#uses=0]
+ ret void
+}
+
+declare i32 @foo(i32)